Microstructural study of a conducting polymer doped with carbon nanotubes
Typ
Examensarbete för masterexamen
Program
Publicerad
2021
Författare
Söderberg, Fredik
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This work concerns the microsctructure of benzimidazobenzophenanthroline, BBL,
films doped with carbon nanotubes, CNTs, to increase the electron mobility of the
films. The CNT dopings were 1, 9 and 50 wt% respectively. The microsctructures
were studied using electron microscopy including scanning electron microscopy and
transmission electron microscopy. The morphology of the films gradually changed
from a continuous BBL film with a relatively rough surface morphology in the 1
wt% films with randomly oriented CNTs to a structure with the BBL forming a
smooth shell of BBL on the CNTs. The CNTs were multiwalled with a high density
of defects. The thickness of the BBL shell was about 20-30 nm in the 1 and 9 wt%
films and 3-4 nm in the 50 wt% films. The results show that the electron mobility
can be even further increased by aligning the CNTs that have a considerably higher
mobility along their long axis and also compared to the BBL. It should be noted
that an alignment of the CNTs would also result in a high directional anisotropy of
the mobility in the BBL:CNT films.
Beskrivning
Ämne/nyckelord
BBL , CNT , SEM , STEM , TEM , SE , doped polymer films , microsctructure